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Finding the Fourth Proportional to 22,059.80, 30,439.08 and 13,107.08

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Solution

The fourth proportional to 22,059.80, 30,439.08 and 13,107.08 is: 18,085.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,059.80 : 30,439.08 = 13,107.08 : x
  2. Step 2: Convert to fraction form
    22,059.80/30,439.08 = 13,107.08/x
  3. Step 3: Cross multiply
    22,059.80x = 30,439.08 × 13,107.08
  4. Step 4: Simplify right side
    22,059.80x = 398,967,304.49
  5. Step 5: Solve for x
    x = 398,967,304.49/22,059.80
  6. Step 6: Final answer
    x = 18,085.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.